{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{2}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}\\
                    &\multicolumn{1}{c}{ISO certified}&\multicolumn{1}{c}{Exporter}\\
\hline
log(Labor)          &       0.065\sym{***}&       0.045\sym{***}\\
                    &    (0.0023)         &    (0.0017)         \\
\hline
Observations        &       93895         &       93984         \\
Adjusted \(R^{2}\)  &       0.214         &       0.229         \\
State x Rural x Product FE&         Yes         &         Yes         \\
SE clusters:        &     Product         &     Product         \\
\hline\hline
\multicolumn{3}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{3}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
}
